A hedgehog pushes a rock of 19 kg up a ramp which is tilted


A hedgehog pushes a rock of 1.9 kg up a ramp, which is tilted at 19.5 degrees to horizontal, at a constant speed of 0.25 m/s for 1.5 minutes, using a force of 7.12N. How much work is done by friction?

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Physics: A hedgehog pushes a rock of 19 kg up a ramp which is tilted
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